The boy’s foster mother took him to Allegiance Health on Dec. 29, and hospital personnel alerted police.

His eyes were bloodshot or pink, Holda said.

The boy went to the University of Michigan C.S. Mott Children’s Hospital in Ann Arbor. Holda was not sure whether he had since left the hospital. A hospital spokeswoman said he was no longer in the university system.

No one has been arrested or charged, and the boy was put in a different foster home, Holda said.

A detective is looking into the case. It is not clear what happened, Holda said.

The boy’s biological mother was the victim in a criminal sexual conduct case.